Effects of different closures for thickness diffusivity
The effects of spatial variations of the thickness diffusivity (K) appropriate to the parameterisation of [Gent, P.R. and McWilliams, J.C., 1990. Isopycnal mixing in ocean circulation models. J. Phys. Oceanogr., 20, 150-155.] are assessed in a coarse resolution global ocean general circulation model...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier Ltd.
2009
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-816 https://doi.org/10.1016/j.ocemod.2008.08.004 |
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ftncar:oai:drupal-site.org:articles_15518 2023-09-05T13:14:16+02:00 Effects of different closures for thickness diffusivity Eden, Carsten (author) Jochum, Markus (author) Danabasoglu, Gokhan (author) 2009-01-01 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-816 https://doi.org/10.1016/j.ocemod.2008.08.004 en eng Elsevier Ltd. Ocean Modelling http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-816 doi:10.1016/j.ocemod.2008.08.004 ark:/85065/d7gh9k03 An edited version of this article was published by Elsevier. Copyright 2009 Elsevier. Ocean modelling Meso-scale eddies Eddy parameterisation Text article 2009 ftncar https://doi.org/10.1016/j.ocemod.2008.08.004 2023-08-14T18:42:09Z The effects of spatial variations of the thickness diffusivity (K) appropriate to the parameterisation of [Gent, P.R. and McWilliams, J.C., 1990. Isopycnal mixing in ocean circulation models. J. Phys. Oceanogr., 20, 150-155.] are assessed in a coarse resolution global ocean general circulation model. Simulations using three closures yielding different lateral and/or vertical variations in K are compared with a simulation using a constant value. Although the effects of changing K are in general small and all simulations remain biased compared to observations, we find systematic local sensitivities of the simulated circulation on K. In particular, increasing K near the surface in the tropical ocean lifts the depth of the equatorial thermocline, the strength of the Antarctic Circumpolar Current decreases while the subpolar and subtropical gyre transports in the North Atlantic increase by increasing K locally. We also find that the lateral and vertical structure of K given by a recently proposed closure reduces the negative temperature biases in the western North Atlantic by adjusting the pathways of the Gulf Stream and the North Atlantic Current to a more realistic position. Article in Journal/Newspaper Antarc* Antarctic north atlantic current North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic The Antarctic Ocean Modelling 26 1-2 47 59 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
topic |
Ocean modelling Meso-scale eddies Eddy parameterisation |
spellingShingle |
Ocean modelling Meso-scale eddies Eddy parameterisation Effects of different closures for thickness diffusivity |
topic_facet |
Ocean modelling Meso-scale eddies Eddy parameterisation |
description |
The effects of spatial variations of the thickness diffusivity (K) appropriate to the parameterisation of [Gent, P.R. and McWilliams, J.C., 1990. Isopycnal mixing in ocean circulation models. J. Phys. Oceanogr., 20, 150-155.] are assessed in a coarse resolution global ocean general circulation model. Simulations using three closures yielding different lateral and/or vertical variations in K are compared with a simulation using a constant value. Although the effects of changing K are in general small and all simulations remain biased compared to observations, we find systematic local sensitivities of the simulated circulation on K. In particular, increasing K near the surface in the tropical ocean lifts the depth of the equatorial thermocline, the strength of the Antarctic Circumpolar Current decreases while the subpolar and subtropical gyre transports in the North Atlantic increase by increasing K locally. We also find that the lateral and vertical structure of K given by a recently proposed closure reduces the negative temperature biases in the western North Atlantic by adjusting the pathways of the Gulf Stream and the North Atlantic Current to a more realistic position. |
author2 |
Eden, Carsten (author) Jochum, Markus (author) Danabasoglu, Gokhan (author) |
format |
Article in Journal/Newspaper |
title |
Effects of different closures for thickness diffusivity |
title_short |
Effects of different closures for thickness diffusivity |
title_full |
Effects of different closures for thickness diffusivity |
title_fullStr |
Effects of different closures for thickness diffusivity |
title_full_unstemmed |
Effects of different closures for thickness diffusivity |
title_sort |
effects of different closures for thickness diffusivity |
publisher |
Elsevier Ltd. |
publishDate |
2009 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-816 https://doi.org/10.1016/j.ocemod.2008.08.004 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic north atlantic current North Atlantic |
genre_facet |
Antarc* Antarctic north atlantic current North Atlantic |
op_relation |
Ocean Modelling http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-002-816 doi:10.1016/j.ocemod.2008.08.004 ark:/85065/d7gh9k03 |
op_rights |
An edited version of this article was published by Elsevier. Copyright 2009 Elsevier. |
op_doi |
https://doi.org/10.1016/j.ocemod.2008.08.004 |
container_title |
Ocean Modelling |
container_volume |
26 |
container_issue |
1-2 |
container_start_page |
47 |
op_container_end_page |
59 |
_version_ |
1776205273582534656 |